A new number-one contender was born on Saturday night, as multiple-time Muay Thai champion Valentina Shevchenko showed off her fast-improving mixed martial arts game by submitting Julianna Pena with a slick second-round armbar in the main event of UFC on FOX 23.

Shevchenko’s victory topped off a night of breakthrough performances in Denver, and as always, the pros were loving things every step of the way. Catch reaction to all of UFC on FOX 23’s main card below.

VALENTINA SHEVCHENKO DEF. JULIANNA PENA

Wow!!! Didn’t see that coming! @ufc

— Alan Jouban (@AlanJouban) January 29, 2017

Beautiful submission from @BulletValentina #BJJ #UFCDenver

— Jessica Jag Aguilar (@jagatt) January 29, 2017

The bullet with the submission!!!! Remaaaaattttttcccchhhhhh!!!! @BulletValentina

— Daniel Cormier (@dc_mma) January 29, 2017

Well I think it’s safe to say, no1 expected a victory like that!! Congratulations @BulletValentina on a beautiful fight. #UFCDenver